Bobbin apparatus for automatic looms



March 7, 1950 R. HRDlNA 2,499,502

BOBBIN APPARATUS FOR AUTOMATIC LOOMS Filed Nov. 15, 1946 3 Sheets-Sheet 1 Rudd ROMA A ltorney B W HM- March 7, 1950 HRDlNA 2,499,502

BOBBIN APPARATUS FOR AUTOMATIC LC JOMS Filed Nov. 15, 1946 3 Sheets-Sheet 2 A Tlorney March 7, 1950 R. HRDlNA 2,499,502

BOBBIN APPARATUS FOR AUTOMATIC LOOMS Filed Nov. 15, 1946 3 Sheets-Sheet 3 Inventor Attorney Patented Mar. 7, 1950 UNITED STATE BOBBIN .flPPfiBrATIilFsOR AUTOMATIC Rudolf. 'Hrdina,v .Tyniste, Czechoslovakia ApplicationiNovemherl In Czechoslovakia December 7,.

5, 1946:, Serial No. 710,165

5 Claims, (Cl. Rik-247) The present invention relates to abobbin apparatus for looms by means of which a completely' satisfactory guiding of the thread ends of the bobbins mounted in the storage container of automatic looms of the most different systems and construction is obtained.

In bobbin devices as'hitherto made the thread ends of the individual bobbin mounted in the storage container are led out from the storage container over wire hooks or smooth rollers in such a way that they come into a previously prepared position for charging the bobbins into the shuttles. These known devices are, however, very complicated and are not reliable in operation because the thread ends of the storage bobbins become entangled on the smooth guide rollers and the twisted and tangledend .of the thread of the bobbin to be transferred does not separate from the other thread ends of the bobbins still in the storage container, and this thread end frequently breaks. These disadvantages are substantial and seriously interfere with the operation. Moreover, in previously proposed devices of this kind the introduction of the thread ends into the associated guides (small wire hooks and the like) is very troublesome and monotonous; further, it is also dangerous because. the operative can easily be injured by the moving parts of the loom.

It also has been proposed to arrange between the bobbin storage container and. a thread ends holder a guide means or slack-supporter shaped in such a manner asito deflect the thread ends from their direct paths", in combination with a means for disengaging said thread ends one after another from said guide or slack supporter when the bobbins are transferred to the shuttle. Such disengaging or taking off device and its driving connection with a. bobbin charge mechanism of the loom is, however, very complicated and not reliable in operation due to the possibility of sticking of the thread ends-in thenotches on the periphery of the guide or slack member. Other prior arrangements in which the slacking of the thread ends is secured by providing an individual holder for each' thread end and'by giving to it a positive .movement'towa'rd the bobbin container'when a bobbin is transferred to the shuttle," represent a complicated and expem sive mechanism suitable only for certain types of the looms.

. :The above disadvantagesare, eliminated by the present invention, the object of which is to-provide a bobbin device oivery implerconstruction which 'l l i i-Q leflfiily and reliab y introd c n the: endsaintoiitbe..csseciet gauieesz nd of'ensuring .a correct and separate individual guiding of the threads of the bobbins. The principal feature of the invention consists-in guiding the. thread ends of the individual bobbins, which are mounted in the storage container, out of the storage container over a guide device disposed at a distance from the storage container, and out .from the latter to a securing bobbin, the guide device or the securing bobbin being so actuated inhconformity withgthe charging device of the .loom at the moment of transferring the bobbin into the shuttle that it is moved into such a position in which the thread ends are slackened and remain slack until such time as the remaining bobbins in the storage container are correspondingly advanced up to the free position. whereupon the thread ends are again tensioned by a backward movement of the guidedevice or of the securing bobbin. Further features of the invention will be describedwith-reference to the accompanying drawings which illustrate diagrammatically, one con-' structional example of a device made according to the invention, andin which v Fig. 1 isa front view of a storage container for; the bobbins provided with the device for guiding and holding the thread ends, these ends being shown tensioned;

Fig. 2 is a side view of Fig. 1; Fig. 3 is a plan View of Fig. l, and Figs. 4 and 5 illustrate in front and side elevar tion, respectively, apparatus made according to; the invention with slackened thread ends.

Referring to the drawings- 7 On the frame I of' the loom is secured, {by means of a bracket 2 a storage container for bobbins 3, the storage container being in general, constituted by two guide carriers 4, 5, which, for examp e, are rigidly connected together by means of a cross arm 6.. The pin 1 of the charging lever 8; with the extraction hammer 9, issecured at one end in thetrame I of the loom, and so extended and curved that it form at the same time a carrier for the securing device It! for the guide de-- nvice (thread guide) II, which, in the example illustrated. is a curved wire; The thread guide is secured at "its top end by means of a bracket l2-to the'carriert. The extended pin-'Tfurther serves also-as a means for mounting thetwoarmed'l'ever 3' which carries at the. end for its longer arm the .securingbobbin i4; .Appin i5 is rotatably mounted on the shorter arm .oi-the; charging lever '8 and carries at. its one end the soacall'ed safety lever l6, whilsttheother; end has keyed cn 'te-ita le er whi h w th-t e.- g mi! l lllfi-i i ing.-iflfilii9 illustrated on the drawing, which efiects the loading of the shuttle with a new bobbin. The lever l1 above mentioned is provided with a stop I9 which, on charging, strikes on a spring pressed plunger 20 which is displaceably mounted in a housing 2| secured on the loom frame I.

According to the invention the plunger 20 is provided with a pin 22 which engages in a slot in one arm of the angle lever 23, which, when the plunger 20 is moved downwardly, moves, by

means of the draw rod 24, the two-armed lever From the bobbin storage container 4, 5, the thread ends 25 of the bobbins 3 are guided over the bobbin guide carrier 5 and the guide wire II to the securing bobbin M, where they are secured by winding them around the neck of the bobbin I 4.

The apparatus described operates as follows:

When a new bobbin is to be charged into a shuttle the draw rod 18 (see Fig. 2) swings the lever ll downwards in the direction of the arrow and the safety lever 16 comes into the horizontal position illustrated in dotted lines in Fig. 2. The stop l9 presses on the plunger 20, the movement of which is transmitted through the pin 22 to the lever 23, and, further, through the draw rod 24 to the lever [3, so that the weft thread ends come into the slack position (see Figs. 4, 5). The stop 26 on the slay or batten, not shown, acts on the safety lever I6 disposed at this moment in the horizontal position and vigorously rotates the two-armed charging lever 8 whereby the hammer 9 of this lever knocks out a bobbin from the storage container into the shuttle, not shown, disposed at this moment below the storage container. n the return of the slay or batten in the direction opposite to the arrow 21 (Fig. 2), the hammer 9 is raised and the bobbins l3 in the storage container drop by gravity by the width of one bobbin and the thread ends 25 slide simultaneously along the guide wire ll.

Since in this movement the bobbins move freely, automatic slackening of the thread ends 25 occurs so that these latter continue to become always more slack after each charging operation. This is prevented by shaping the guide wire II in such a way that the thread ends in their downward movement along the wire I I become always more tensioned, i. e. the sum of the distances measured on the advancing thread from the edge of the bobbin storage container (carrier to the guide wire H and from there out to the securing bobbin M in the direction of displacement of the thread 25 increases progressively and smoothly.

After the bobbin has been charged into the shuttle the driving mechanism effects, by means of the draw rod N3, the return guiding of the safety lever l6 into the rest position, whereby the two-armed lever 23 is moved back simultaneously and turns the two-armed lever [3 by means of the draw rod 24. The securing bobbin I4 thereupon comes into the original position (Fig. 1) and the thread ends 25 are again tensioned.

The bobbin storage container described in the above constructional example comprises, in general, a rectilinear body suitably curved at its lower end in order to guide the bobbins freely in the operating field of'the hammer 9. The bobbin container can, however, also within the scope of the invention-similarly to the guide wire ll be of curved constructionQ Further, it may also beof drum shape similar to the drum. containers of the Northrop system or it maydn generaLhave any suitable shape. The shape of the thread guide II is then adapted to the shape of the bobbin container.

What I claim and desire to secure by Letters Patent is:

1. In a bobbin feeding device for looms, the combination with bobbin charging mechanism of a bobbin storage container and a movable securing means for the free ends of the bobbin threads, a guide means disposed at a distance from said container and guiding the free ends of the bobbin threads to said securing means, and means permitting movement of said securing means towards and away from said container in synchronism with the bobbin charging mechanism of the loom, whereby the thread ends of all the bobbins are slackened and remain slack during the bobbin exchange operation and by a return movement of said securing means the thread ends of all the bobbins are again tensioned.

2. In a bobbin feeding device for looms, the combination with a bobbin charging mechanism of a bobbin storage container and a movable securing means for the free ends of the bobbin threads, a guide means consisting of a curved piece of wire, disposed at a distance from said container and guidingthe free ends of the bobbin threads to said securing means, and means permitting movement of said securing means towards and away from said container in synchronism with the bobbin charging mechanism of the loom, whereby the thread ends of all the bobbins are slackened and remain slack during the bobbin exchange operation and by a return movement of said securing means the thread ends of all the bobbins are again tensioned.

3. In a bobbin feeding device for looms, the combination with bobbin charging mechanism of a bobbin storage container and a movable securing means for the free ends of the bobbin threads, a guide means consisting of a piece of wire curved with regard to the form and position of said bobbin storage container in such a manner that the thread ends in their downward movement along the guide wire become progressively more tensioned, said guide means being disposed at a distance from said container and guiding the free ends of the bobbin threads to said securing means, and means permitting movement of said securing means towards and away from said container in synchronism with the bobbin charging mechanism of the loom, whereby the thread ends of all the bobbins are slackened and remain slack during the bobbin exchange operation and by a return movement of said securing means the thread ends of all the bobbins are again tensioned.

4. In a bobbin feeding device for looms, the combination with a bobbin storage container and a movable securing means for the free ends of the bobbin threads, of a guide means disposed at a distance from said container and guiding the free ends of the bobbin threads to said securing means, a two-armed lever for supporting the securing means, a prolongated pin on which said lever and securing means are mounted, and a bobbin charging means the movement of which causes the swinging movement of said thread ends securing means.

5 In a bobbin feeding device for looms, the combination with a bobbin storage container and a movable securing means for the free'ends of the bobbin threads, of a guide means disposed curing means, a two-armed lever for supporting REFERENCES CITED the securing means, a prolongated pin on which said lever and securing means are mounted, and i ifig gsigg are of record m the a bobbin charging means the movement of which causes the swinging movement of said thread 5 UN T D S A ES PATENTS ends securing means by means comprising a draw Number Name Date rod, a bell crank lever, and a spring pressed 470 590 North) Mar 8 1892 plunger for operating said bell crank lever in one 695040 Dra er p Mar 1902 direction, said bell crank lever cooperating'with 1 098685 g Jun'e 1914 a stop on said bobbin charging means for operi0 ating it in the opposite direction.

RUDOLF HRDINA. 

